public GistOptionsPage([NotNull] Lifetime lifetime, DataContexts dataContexts, GitHubService gitHubService, OptionsSettingsSmartContext settings)
: base(lifetime, Pid)
{
if (lifetime == null)
throw new ArgumentNullException("lifetime");
myGitHubService = gitHubService;
myEmptyDataContext = dataContexts.Empty;
TextBox usernameBox;
System.Windows.Forms.TextBox passwordBox;
Control = InitView(out usernameBox, out passwordBox);
settings.SetBinding(lifetime, (GitHubSettings s) => s.Username, usernameBox, TextBox.TextProperty);
settings.SetBinding(lifetime, (GitHubSettings s) => s.Password, WinFormsProperty.Create(lifetime, passwordBox, box => box.Text, true));
}